What is revealed?

According to chapter 50-70, there was a fire setted up by the four liars in summerr 15. And the others didn't know about their crime. The aunties were all arguing about the goods, the house the Sinclair family had in summer 15. They argued every they and asked their child, the four liars to ask for the aunties demand as well. Gat was not allowed to go to lunch or supper with granddad so none of the liars went to supper or lunch as well. Carrie refused the propose of Ed without even asking Granddad. Cadence was asked to break up with Gat. All the liars were angry and they wanted to have their nice family back, so they setted up the fire.